$\bf \textit{Sum and Difference Identities}
\\ \quad \\
sin({{ \alpha}} + {{ \beta}})=sin({{ \alpha}})cos({{ \beta}}) + cos({{ \alpha}})sin({{ \beta}})
\\ \quad \\
sin({{ \alpha}} - {{ \beta}})=sin({{ \alpha}})cos({{ \beta}})- cos({{ \alpha}})sin({{ \beta}})
\\ \quad \\
\boxed{cos({{ \alpha}} + {{ \beta}})= cos({{ \alpha}})cos({{ \beta}})- sin({{ \alpha}})sin({{ \beta}})}\impliedby notice
\\ \quad \\
cos({{ \alpha}} - {{ \beta}})= cos({{ \alpha}})cos({{ \beta}}) + sin({{ \alpha}})sin({{ \beta}})$

4 0

3 years ago

HELP ME NOW!!!!!!!!HELP ME NOW!!!!!!!!HELP ME NOW!!!!!!!!HELP ME NOW!!!!!!!! OK! WHAT IS THE THING PLUS THAT?

miss Akunina [59]

Answer:

girl it is 2

Step-by-step explanation:

3 0

3 years ago

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Diana had 41 stickers. She put them in 7 equal groups. She put as many as possible in to each group. She gave the leftover stick

mr Goodwill [35]

She gave Diana, her sister, 6 stickers. This is because 41 divided by 7 is 5 R 6 and there are 6 stickers left if you want each group to have the same amount with no leftovers.

6 0

3 years ago

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